Method for producing stencils for printing textile fabrics



March 17, 1936. J. KESSEL 2,034,437

METHOD FOR .PRODUCING STNCILS FOR PRNTING TEXTILE FABRICSl Filed Nov. 5,1932 [ITIL by 7M uw@ oz'raqg 55 and after the drying the raised portionsare ing the composition o f the caoutchouc coating 55 Patented Mar. 17,1936 f l l l UNITED STATES PATET GFFHCE METHOD FOR PRODUCING STENCILSFOR PRINTING TEXTILE FABRICS Josef Kessel, Krefeld-Beckum, GermanyvApplication November 3, 1932, Serial No. 641,045 In Germany November 5,1931 1 Claim. (Cl. 4138.5)

In the hitherto known methods for producing ground off, the washableportions being thenr'eprinting stencils for cloth printing, the patternis moved. painted on the plate made of gauze or metal iab- Sulphitewaste liquor is a commercial product ric by means of water glass and,after the stencil and a residue from the manufacture of cellulose,

5 has been rendered durable by means of a coat of being the boilingsolution from which the finished paint is again Washed out. 'I'hismethod, howcellulose is freed. ever, produces a pattern which is notsharp and The method is employed in the following manconsequently cannotbe employed for iine patterns ner: because, owing to the washing out ofthe water The printing frame in which the gauze (Fig. 1)

glass, the contours of the pattern become damaged is stretched is placedon a vmarking table with the 10 or ragged so that fine lines and dotscannot be aid of which the position of the pattern to be preprinted outat all. pared is accurately determined. The gauze is It has been foundthat the patterns can be carthen coated with a soluble auxiliary coatingof ried out very much smaller and therefore absozinc-white bound withsulphitelye (Fig. 2),which lutely sharply if they are not applieddirectly onto has the property of bridging even wide meshes the gauzebut onto a soluble auxiliary coating, for and consequently does notpenetrate vto the other example of varnish from which they are removedside of the gauze. 'I'he penetration of the coating before the Washingout. By the employment of is prevented by the addition of suiiicientzinc two different auxiliary substances for producing white.` When thecoating has completely dried,

the patterns and the consecutive removal thereof the pattern is appliedby means of an auxiliary 20 the contours of the individual picturesremain unstencil on to the outer side of the gauze, that is on damaged.the opposite side to the auxiliary coating (Fig. 3),

It is not new to make textile stencils by succesfor which purpose aviscous likewise soluble paint sively treating a surface of gauze, silkor wire is employed having a similar composition to the y fabric withvarnishes soluble in water and insoluauxiliary coating, the zinc-whitebeing however 25 ble in Water. 'I'hese methods have, however,notpreferably coloured with aniline red, and this hitherto beengenerally introduced because in this pattern enters the meshes of thegauze and pene- Yinstance the pattern is formed by dissolving the tratesthe auxiliary coating with which it intipaste and consequently thecontours of the patf mately unites. After the removal of the auxiliarytern are likewise damaged and ragged. Accordstencil the pattern remainson the gauze in relief 30 ing to the invention the pattern is applied inrewith sharp contours. 'Ihe pattern must then dry lief onto the surfaceby means of hardening paste completely. Whereupon the side of the gauzeand a 4damaging of its contours is prevented by carrying the pattern isthen coated with a var- .glrlding off. Y nish-like caoutchouc solution(Fig. 4) composed An embodiment of the invention is illustrated of onepart by weight of linseed oil, one part of 35 by way of example in theaccompanying drawing caoutchouc and three parts of pigments Which are inwhich:- intermixed and adhere tightly to the gauze. The Figs. 1 to 7show in cross section a stencil in the blocked out parts of the stencilare therefore prodifferent stages of production. tected by the coatingof caoutchouc so that they 40 Fig. 8 is a cross section of the nishedstencil. are not affected during the further treatment of 40 Fig. 9 isatop plan view of Fig. 8. the stencil. When the caoutchouc coating hasThe invention consists in that on one side of dried, the printing frameis submerged in water the stencil support l consisting of gauze or theand the raised portion of the pattern ground oil like a tough but porousauxiliary coating 2 adaptto the surface of the caoutchouc layer coveringed to be washed oil and consisting of zinc-white the gauze (Fig.'5) byfriction using iine pumice 45 bound with sulphite waste liquor islapplied on to stone. The auxiliary coating is then washed off which fromthe unpainted side of the gauze the from the inner side of the frametogether with pattern 3 proper is applied in relief by means of theremainder of the pattern paint (Fig. 6). The an auxiliary stencil and ofapaint which is viscous blocked out parts of the stencil itself remainsin but capable to be washed out and which consists the caoutchouccoating with sharp contours as the 50 of the constituents of theauxiliary varnish, the varnish was applied by means of the auxiliaryzinc-white of which is preferably colored with stencil. In order toprevent the finished stencil` anilne red, whereupon the side of thegauze which from becoming porous, the gauze is coated on the carries.the pattern is coated with caoutchouc 4 washed inner side with a dilutedblue varnish hav- (Fig. '1), and when this blue varnish is dry, thestencil is ready for use (Figs. 8 and 9). The dilution consists of aboutone further component of the linseed oil.

I claim:- A method for producing stencils for printing textile fabrics,consisting .in applying to one side ,of a-gauze forming the support ofthe stencil an adhesive, glutinous but porous soluble auxiliary,

coating composed of zinc-white bound with sulphite lye, in applying thepattern in relief to the other side of the gauze with the aid of anauxiliary stencil, by means of a viscous likewise soluble the pattern,and in removing the soluble portions from the gauze.

` JOS. KESSEL.

